#include <stdio.h>
#include <vector>

class A
{
public:
	static std::vector<int> request;
};

class B
{
public:
	A ba;
};

class C
{
public:
	A ca;
};

class D
{
public:
	B b;
	C c;
	void test(){
		b.ba.request.push_back(1);
		b.ba.request.push_back(1);
		b.ba.request.push_back(1);

	}
};